diff --git a/invokeai/frontend/web/src/features/canvas/store/canvasSlice.ts b/invokeai/frontend/web/src/features/canvas/store/canvasSlice.ts
index 371719e087..ae184aec00 100644
--- a/invokeai/frontend/web/src/features/canvas/store/canvasSlice.ts
+++ b/invokeai/frontend/web/src/features/canvas/store/canvasSlice.ts
@@ -7,7 +7,14 @@ import {
 import { IRect, Vector2d } from 'konva/lib/types';
 import { clamp, cloneDeep } from 'lodash-es';
 //
+import {
+  setActiveTab,
+  setAspectRatio,
+  setShouldUseCanvasBetaLayout,
+} from 'features/ui/store/uiSlice';
 import { RgbaColor } from 'react-colorful';
+import { sessionCanceled } from 'services/api/thunks/session';
+import { ImageDTO } from 'services/api/types';
 import calculateCoordinates from '../util/calculateCoordinates';
 import calculateScale from '../util/calculateScale';
 import { STAGE_PADDING_PERCENTAGE } from '../util/constants';
@@ -28,13 +35,6 @@ import {
   isCanvasBaseImage,
   isCanvasMaskLine,
 } from './canvasTypes';
-import { ImageDTO } from 'services/api/types';
-import { sessionCanceled } from 'services/api/thunks/session';
-import {
-  setActiveTab,
-  setShouldUseCanvasBetaLayout,
-} from 'features/ui/store/uiSlice';
-import { imageUrlsReceived } from 'services/api/thunks/image';
 
 export const initialLayerState: CanvasLayerState = {
   objects: [],
@@ -240,6 +240,16 @@ export const canvasSlice = createSlice({
         state.scaledBoundingBoxDimensions = scaledDimensions;
       }
     },
+    toggleBoundingBoxDimensions: (state) => {
+      const [currWidth, currHeight] = [
+        state.boundingBoxDimensions.width,
+        state.boundingBoxDimensions.height,
+      ];
+      state.boundingBoxDimensions = {
+        width: currHeight,
+        height: currWidth,
+      };
+    },
     setBoundingBoxCoordinates: (state, action: PayloadAction<Vector2d>) => {
       state.boundingBoxCoordinates = floorCoordinates(action.payload);
     },
@@ -864,6 +874,15 @@ export const canvasSlice = createSlice({
     builder.addCase(setActiveTab, (state, action) => {
       state.doesCanvasNeedScaling = true;
     });
+    builder.addCase(setAspectRatio, (state, action) => {
+      const ratio = action.payload;
+      if (ratio) {
+        state.boundingBoxDimensions.height = roundToMultiple(
+          state.boundingBoxDimensions.width / ratio,
+          8
+        );
+      }
+    });
 
     // builder.addCase(imageUrlsReceived.fulfilled, (state, action) => {
     //   const { image_name, image_url, thumbnail_url } = action.payload;
@@ -912,6 +931,7 @@ export const {
   setBoundingBoxDimensions,
   setBoundingBoxPreviewFill,
   setBoundingBoxScaleMethod,
+  toggleBoundingBoxDimensions,
   setBrushColor,
   setBrushSize,
   setCanvasContainerDimensions,
diff --git a/invokeai/frontend/web/src/features/parameters/components/Parameters/Canvas/BoundingBox/ParamBoundingBoxHeight.tsx b/invokeai/frontend/web/src/features/parameters/components/Parameters/Canvas/BoundingBox/ParamBoundingBoxHeight.tsx
index b529c87225..78fa245753 100644
--- a/invokeai/frontend/web/src/features/parameters/components/Parameters/Canvas/BoundingBox/ParamBoundingBoxHeight.tsx
+++ b/invokeai/frontend/web/src/features/parameters/components/Parameters/Canvas/BoundingBox/ParamBoundingBoxHeight.tsx
@@ -2,22 +2,26 @@ import { createSelector } from '@reduxjs/toolkit';
 import { useAppDispatch, useAppSelector } from 'app/store/storeHooks';
 import { defaultSelectorOptions } from 'app/store/util/defaultMemoizeOptions';
 import IAISlider from 'common/components/IAISlider';
+import { roundToMultiple } from 'common/util/roundDownToMultiple';
 import {
   canvasSelector,
   isStagingSelector,
 } from 'features/canvas/store/canvasSelectors';
 import { setBoundingBoxDimensions } from 'features/canvas/store/canvasSlice';
+import { uiSelector } from 'features/ui/store/uiSelectors';
 import { memo } from 'react';
 
 import { useTranslation } from 'react-i18next';
 
 const selector = createSelector(
-  [canvasSelector, isStagingSelector],
-  (canvas, isStaging) => {
+  [canvasSelector, isStagingSelector, uiSelector],
+  (canvas, isStaging, ui) => {
     const { boundingBoxDimensions } = canvas;
+    const { aspectRatio } = ui;
     return {
       boundingBoxDimensions,
       isStaging,
+      aspectRatio,
     };
   },
   defaultSelectorOptions
@@ -25,7 +29,8 @@ const selector = createSelector(
 
 const ParamBoundingBoxWidth = () => {
   const dispatch = useAppDispatch();
-  const { boundingBoxDimensions, isStaging } = useAppSelector(selector);
+  const { boundingBoxDimensions, isStaging, aspectRatio } =
+    useAppSelector(selector);
 
   const { t } = useTranslation();
 
@@ -36,6 +41,15 @@ const ParamBoundingBoxWidth = () => {
         height: Math.floor(v),
       })
     );
+    if (aspectRatio) {
+      const newWidth = roundToMultiple(v * aspectRatio, 8);
+      dispatch(
+        setBoundingBoxDimensions({
+          width: newWidth,
+          height: Math.floor(v),
+        })
+      );
+    }
   };
 
   const handleResetHeight = () => {
@@ -45,6 +59,15 @@ const ParamBoundingBoxWidth = () => {
         height: Math.floor(512),
       })
     );
+    if (aspectRatio) {
+      const newWidth = roundToMultiple(512 * aspectRatio, 8);
+      dispatch(
+        setBoundingBoxDimensions({
+          width: newWidth,
+          height: Math.floor(512),
+        })
+      );
+    }
   };
 
   return (
diff --git a/invokeai/frontend/web/src/features/parameters/components/Parameters/Canvas/BoundingBox/ParamBoundingBoxSize.tsx b/invokeai/frontend/web/src/features/parameters/components/Parameters/Canvas/BoundingBox/ParamBoundingBoxSize.tsx
new file mode 100644
index 0000000000..6c0ab0cd85
--- /dev/null
+++ b/invokeai/frontend/web/src/features/parameters/components/Parameters/Canvas/BoundingBox/ParamBoundingBoxSize.tsx
@@ -0,0 +1,57 @@
+import { Flex, Spacer, Text } from '@chakra-ui/react';
+import { useAppDispatch } from 'app/store/storeHooks';
+import IAIIconButton from 'common/components/IAIIconButton';
+import { toggleBoundingBoxDimensions } from 'features/canvas/store/canvasSlice';
+import { useTranslation } from 'react-i18next';
+import { MdOutlineSwapVert } from 'react-icons/md';
+import ParamAspectRatio from '../../Core/ParamAspectRatio';
+import ParamBoundingBoxHeight from './ParamBoundingBoxHeight';
+import ParamBoundingBoxWidth from './ParamBoundingBoxWidth';
+
+export default function ParamBoundingBoxSize() {
+  const dispatch = useAppDispatch();
+  const { t } = useTranslation();
+
+  return (
+    <Flex
+      sx={{
+        gap: 2,
+        p: 4,
+        borderRadius: 4,
+        flexDirection: 'column',
+        w: 'full',
+        bg: 'base.150',
+        _dark: {
+          bg: 'base.750',
+        },
+      }}
+    >
+      <Flex alignItems="center" gap={2}>
+        <Text
+          sx={{
+            fontSize: 'sm',
+            width: 'full',
+            color: 'base.700',
+            _dark: {
+              color: 'base.300',
+            },
+          }}
+        >
+          {t('parameters.aspectRatio')}
+        </Text>
+        <Spacer />
+        <ParamAspectRatio />
+        <IAIIconButton
+          tooltip={t('ui.swapSizes')}
+          aria-label={t('ui.swapSizes')}
+          size="sm"
+          icon={<MdOutlineSwapVert />}
+          fontSize={20}
+          onClick={() => dispatch(toggleBoundingBoxDimensions())}
+        />
+      </Flex>
+      <ParamBoundingBoxWidth />
+      <ParamBoundingBoxHeight />
+    </Flex>
+  );
+}
diff --git a/invokeai/frontend/web/src/features/parameters/components/Parameters/Canvas/BoundingBox/ParamBoundingBoxWidth.tsx b/invokeai/frontend/web/src/features/parameters/components/Parameters/Canvas/BoundingBox/ParamBoundingBoxWidth.tsx
index 07d74049ed..69edd09137 100644
--- a/invokeai/frontend/web/src/features/parameters/components/Parameters/Canvas/BoundingBox/ParamBoundingBoxWidth.tsx
+++ b/invokeai/frontend/web/src/features/parameters/components/Parameters/Canvas/BoundingBox/ParamBoundingBoxWidth.tsx
@@ -2,22 +2,26 @@ import { createSelector } from '@reduxjs/toolkit';
 import { useAppDispatch, useAppSelector } from 'app/store/storeHooks';
 import { defaultSelectorOptions } from 'app/store/util/defaultMemoizeOptions';
 import IAISlider from 'common/components/IAISlider';
+import { roundToMultiple } from 'common/util/roundDownToMultiple';
 import {
   canvasSelector,
   isStagingSelector,
 } from 'features/canvas/store/canvasSelectors';
 import { setBoundingBoxDimensions } from 'features/canvas/store/canvasSlice';
+import { uiSelector } from 'features/ui/store/uiSelectors';
 import { memo } from 'react';
 
 import { useTranslation } from 'react-i18next';
 
 const selector = createSelector(
-  [canvasSelector, isStagingSelector],
-  (canvas, isStaging) => {
+  [canvasSelector, isStagingSelector, uiSelector],
+  (canvas, isStaging, ui) => {
     const { boundingBoxDimensions } = canvas;
+    const { aspectRatio } = ui;
     return {
       boundingBoxDimensions,
       isStaging,
+      aspectRatio,
     };
   },
   defaultSelectorOptions
@@ -25,7 +29,8 @@ const selector = createSelector(
 
 const ParamBoundingBoxWidth = () => {
   const dispatch = useAppDispatch();
-  const { boundingBoxDimensions, isStaging } = useAppSelector(selector);
+  const { boundingBoxDimensions, isStaging, aspectRatio } =
+    useAppSelector(selector);
 
   const { t } = useTranslation();
 
@@ -36,6 +41,15 @@ const ParamBoundingBoxWidth = () => {
         width: Math.floor(v),
       })
     );
+    if (aspectRatio) {
+      const newHeight = roundToMultiple(v / aspectRatio, 8);
+      dispatch(
+        setBoundingBoxDimensions({
+          width: Math.floor(v),
+          height: newHeight,
+        })
+      );
+    }
   };
 
   const handleResetWidth = () => {
@@ -45,6 +59,15 @@ const ParamBoundingBoxWidth = () => {
         width: Math.floor(512),
       })
     );
+    if (aspectRatio) {
+      const newHeight = roundToMultiple(512 / aspectRatio, 8);
+      dispatch(
+        setBoundingBoxDimensions({
+          width: Math.floor(512),
+          height: newHeight,
+        })
+      );
+    }
   };
 
   return (
diff --git a/invokeai/frontend/web/src/features/ui/components/tabs/UnifiedCanvas/UnifiedCanvasCoreParameters.tsx b/invokeai/frontend/web/src/features/ui/components/tabs/UnifiedCanvas/UnifiedCanvasCoreParameters.tsx
index 6ea9d4bc8d..6e4ce7d5d0 100644
--- a/invokeai/frontend/web/src/features/ui/components/tabs/UnifiedCanvas/UnifiedCanvasCoreParameters.tsx
+++ b/invokeai/frontend/web/src/features/ui/components/tabs/UnifiedCanvas/UnifiedCanvasCoreParameters.tsx
@@ -4,8 +4,7 @@ import { stateSelector } from 'app/store/store';
 import { useAppSelector } from 'app/store/storeHooks';
 import { defaultSelectorOptions } from 'app/store/util/defaultMemoizeOptions';
 import IAICollapse from 'common/components/IAICollapse';
-import ParamBoundingBoxHeight from 'features/parameters/components/Parameters/Canvas/BoundingBox/ParamBoundingBoxHeight';
-import ParamBoundingBoxWidth from 'features/parameters/components/Parameters/Canvas/BoundingBox/ParamBoundingBoxWidth';
+import ParamBoundingBoxSize from 'features/parameters/components/Parameters/Canvas/BoundingBox/ParamBoundingBoxSize';
 import ParamCFGScale from 'features/parameters/components/Parameters/Core/ParamCFGScale';
 import ParamIterations from 'features/parameters/components/Parameters/Core/ParamIterations';
 import ParamModelandVAEandScheduler from 'features/parameters/components/Parameters/Core/ParamModelandVAEandScheduler';
@@ -51,8 +50,7 @@ const UnifiedCanvasCoreParameters = () => {
             <Box pt={2}>
               <ParamSeedFull />
             </Box>
-            <ParamBoundingBoxWidth />
-            <ParamBoundingBoxHeight />
+            <ParamBoundingBoxSize />
           </>
         ) : (
           <>
@@ -65,8 +63,7 @@ const UnifiedCanvasCoreParameters = () => {
             <Box pt={2}>
               <ParamSeedFull />
             </Box>
-            <ParamBoundingBoxWidth />
-            <ParamBoundingBoxHeight />
+            <ParamBoundingBoxSize />
           </>
         )}
         <ImageToImageStrength />